API 6A Choke Valves for Drilling Manifold Product Descriptions Choke valves are used to control flow rate and pressure for processing of producedfluids in cementing and well testing. The critical components of chokevalves are forged from high strength alloy steel with superior abrasive resistance.The spring energized seal structure of stem provides unsurpassed reliability. product feature Choke Valve Parameters Choke Valve Repair Kit